CRACK OTL - Issues After First POWER ON [resolved]

[mipheres]

Hi I made sure the led is soldered ok.

Still same result,
the voltage measurements are off
small tube does not glow
one of the leds does not lit.

 

[Deluk]

Looks as if you have a link between A1 and A2. This shouldn't be there.

 

[mipheres]

triple checked A1-A2 connection, Nothing there: A1 is not connected to A2.

What should I check next?

 

[Deluk]

triple checked A1-A2 connection, Nothing there: A1 is not connected to A2.

Just looked at your picture again and have to say that I'm very surprised at that. What do others think?

 

[kgoss]

The picture looks like maybe a resistor lead that you clipped is shorting the pins?  The wire looks a lot smaller than the coated wire.

 

[ALL212]

I think there's something seriously wrong with that LED...take a real close look...

 

[Doc B]

Witch LED are you referring too?

 

[borism]

Of the WEST!

 

[ALL212]

Since I'm feeling guilty about derailing this a bit...

I've blown boards and "other" with cutoffs falling into places you really don't want them to fall.  Based on the picture you may have a cutoff that has dropped into the socket area.  Toothbrush works good for sweeping in areas like that.  I have to use a magnifying glass to get in that close but it works.

 

[mipheres]

you are right about the clipping, but when I wrote "triple check", this was after  I cleared the metal and checked for a short with a tester.

witch way to go now? "go west"? ;D

 

[Paul Birkeland]

Based on your voltages, at least half of the 12AU7 is glowing.  It can't be that both halves don't glow.  Please recheck with the light off in the room.

Also, can you measure (carefully) the DC voltage at A7?

 

[mipheres]

Hi,

DC Voltage on A7 is 0 - zero.

 

[Paul Birkeland]

Based on your voltages, at least half of the 12AU7 is glowing.  It can't be that both halves don't glow.  Please recheck with the lights off in the room.

 

[mipheres]

yes, looks like both halves glow.
see attached

 

[Paul Birkeland]

Carefully check the voltage at A8.

 

[mipheres]

A8 measures 11.3V

 

[mipheres]

Bump

 

[Paul Birkeland]

You can replace the LED or wire in a jumper from A3 to A8.  (The LED has likely taken too much heat and has fractured)

 

[mipheres]

sorry I dont know what to do exactly. can you write a more detailed explanation?
Thanks

 

[Paul Birkeland]

sorry I dont know what to do exactly. can you write a more detailed explanation?
Thanks

Connect A3 and A8 with a piece of wire.